.j-mask {
position:fixed;
top: 0px;
right:0px;
bottom:0px;
filter: alpha(opacity=60);
background-color: #777;
z-index: 1002;
left: 0px;
opacity:0.6;
-moz-opacity:0.6;
width:100%;
height:100%;
text-align: center;
}
